this is a football that came from an auction in feb of 1980 .The auction was an estate sale that was held buy the public gaurdian office in santa clara it was stored 9 ys. 2 mos before the sale . I know this to be fact as my father was the auctioneer and auction city san jose had the county contract . I buoght a box of misc.contents for $ 00.25 . some of the names i remember are ART HILL,,DICK HILL, ART THOMSON,CHARLIE SMITH,TED KOY ECT. ECT. ECT. I'm a Green Bay fan so dont know much about Raiders teem lineups in the late 60s early 70s so Im wondering how to find out the year its from ?